Exhaust structure of micro-foaming injection mold

Abstract

The utility model relates to the technical field of injection molds, and discloses a micro-foaming injection mold exhaust structure which comprises a lower mold and an upper mold, a guide rod is fixedly mounted at the top of the lower mold, the upper mold is slidably connected to the outer wall of the guide rod, an injection molding pipe is fixedly mounted on the inner wall of the upper mold, and the injection molding pipe is slidably connected to the guide rod. According to the exhaust structure of the micro-foaming injection mold, the air cylinder is arranged to be matched with the connecting rod, the protruding block, the rotary drum and the spiral groove, so that the T-shaped rod can be driven to move up and down on the inner wall of the sliding groove, the T-shaped rod slides upwards, and the ball plug can be driven to be separated from the through hole; air in the cavity between the upper die and the lower die can be conveniently exhausted, the T-shaped rod slides downwards to drive the ball plug to be attached to the interior of the through hole, at the moment, the through hole can be plugged through the ball plug, and it is avoided that plastic enters the interior of the exhaust hole to block the exhaust hole.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an exhaust structure of a micro-foaming injection mold. Background Art

[0002] An injection mold refers to a device that injects resin material into a metal model to obtain a product with a certain shape. The advantages of the injection molding method are fast production speed, high efficiency, and automated operation.

[0003] The micro-foam injection molding process is an innovative precision injection molding technology, which is mainly used to reduce the weight of products and effectively improve the dimensional stability of products. Vent holes are usually opened on the molds used for micro-foam injection molding to discharge excess air in the mold during the product injection process to ensure the air tightness of the product.

[0004] However, most of the exhaust holes opened on the micro-foam injection molds are usually straight-through, lacking a device that can freely block the exhaust holes, which makes it very easy for plastic to enter the exhaust holes during the molding process in the mold, and then easily block the exhaust holes, affecting the injection molding quality of the product. Utility Model Content

[0005] The utility model aims to provide a micro-foam injection mold exhaust structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a micro-foam injection mold exhaust structure, comprising a lower mold and an upper mold, the top of the lower mold is fixedly installed with a guide rod, the upper mold is slidably connected to the outer wall of the guide rod, the inner wall of the upper mold is fixedly installed with an injection tube, the upper mold is provided with an exhaust hole, the bottom of the exhaust hole is provided with a through hole, the side wall of the exhaust hole is provided with a slide groove, and the upper mold is provided with an exhaust mechanism, by providing the exhaust mechanism, the through hole can be blocked after the product injection molding is completed, to prevent plastic from entering the exhaust hole through the through hole and causing the exhaust hole to be blocked, the exhaust mechanism is provided with a cleaning mechanism for cleaning the through hole, by providing the cleaning mechanism, the plastic on the inner wall of the through hole can be cleaned, to prevent the plastic from affecting the ball plug to block the through hole, the exhaust mechanism comprises:

[0007] A rotating drum, the rotating drum is rotatably connected to the inner wall of the exhaust hole, a spiral groove is provided on the rotating drum, a convex block is fixedly installed on the outer wall of the rotating drum, and a cylinder is fixedly installed on the top of the upper mold, and the rotating drum is matched with the spiral groove to drive the T-shaped rod to move up and down;

[0008] A T-shaped rod, the T-shaped rod is slidably connected to the inner wall of the slide groove, a ball plug is fixedly installed at the bottom of the T-shaped rod, the outer wall of the ball plug is attached to the inner wall of the through hole, the ball plug is made of stainless steel, and the T-shaped rod can be used to drive the ball plug to move up and down;

[0009] A connecting rod, one end of which is hinged to the bottom of the protrusion, and the other end of which is hinged to the piston end of the cylinder.

[0010] Preferably, the cleaning mechanism comprises a cross bar, and the cross bar is fixedly mounted on the inner wall of the drum.

[0011] Preferably, a longitudinal rod is fixedly mounted on the outer wall of the cross rod, and one end of the longitudinal rod away from the cross rod passes through the T-rod and the ball plug and is fixedly mounted with a connecting rod, and the longitudinal rod fits with the T-rod and the ball plug at the penetration point.

[0012] Preferably, a scraper is fixedly mounted on one end of the connecting rod away from the longitudinal rod, and the through hole can be cleaned by providing the scraper.

[0013] Preferably, the side wall of the scraper is attached to the inner wall of the through hole.

[0014] Preferably, the outer wall of the T-bar fits against the inner wall of the spiral groove.

[0015] Compared with the prior art, the utility model provides a micro-foam injection mold exhaust structure, which has the following beneficial effects:

[0016] 1. The exhaust structure of the micro-foam injection mold can drive the T-bar to move up and down on the inner wall of the slide groove by setting a cylinder to cooperate with the connecting rod, the bump, the rotating cylinder, and the spiral groove. The ball plug can be driven to disengage from the through hole by sliding the T-bar upward, so as to facilitate the discharge of air in the cavity between the upper mold and the lower mold. The ball plug can be driven to fit into the inside of the through hole by sliding the T-bar downward. At this time, the through hole can be blocked by the ball plug to prevent the plastic from entering the exhaust hole and causing the exhaust hole to be blocked.

[0017] 2. The exhaust structure of the micro-foam injection mold can scrape off the plastic attached to the inner wall of the through hole through the rotation of the drum in coordination with the cross bar, longitudinal bar, connecting rod and scraper, so as to prevent the plastic from adhering to the inner wall of the through hole and affecting the ball plug to block the through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the upper mold of the utility model;

[0020] Figure 3 This is a schematic diagram of the overall structure of the rotary drum of the utility model;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the rotary drum of the utility model;

[0022] Figure 5This is a schematic diagram of the overall structure of the T-shaped rod of the utility model;

[0023] Figure 6 For this utility model Figure 1 A schematic diagram of the enlarged structure at point A;

[0024] Figure 7 For this utility model Figure 2 Schematic diagram of the enlarged structure at B.

[0025] In the figure: 1. lower mold; 2. guide rod; 3. upper mold; 4. injection tube; 5. exhaust hole; 6. through hole; 7. slide groove; 8. exhaust mechanism; 81. rotating drum; 82. T-bar; 83. connecting rod; 84. spiral groove; 85. bump; 86. cylinder; 87. ball plug; 9. cleaning mechanism; 91. cross bar; 92. longitudinal bar; 93. connecting rod; 94. scraper. DETAILED DESCRIPTION

[0026] like Figure 1-Figure 7 As shown, the utility model provides a technical solution: a micro-foam injection mold exhaust structure, including a lower mold 1 and an upper mold 3, a guide rod 2 is fixedly installed on the top of the lower mold 1, the upper mold 3 is slidably connected to the outer wall of the guide rod 2, an injection tube 4 is fixedly installed on the inner wall of the upper mold 3, plastic is injected into the injection tube 4 through an injection molding machine, so that the plastic enters the cavity between the upper mold 3 and the lower mold 1, an exhaust hole 5 is opened on the upper mold 3, and a through hole 6 is opened at the bottom of the exhaust hole 5, and the ball plug 87 can be driven to disengage from the through hole 6 by sliding the T-shaped rod 82 upward. At this time, the air in the cavity between the upper mold 3 and the lower mold 1 can be discharged outward through the through hole 6 and the exhaust hole 5. A slide groove 7 is provided on the side wall of the exhaust hole 5. An exhaust mechanism 8 is provided on the upper mold 3. By providing the exhaust mechanism 8, the through hole 6 can be sealed after the product injection molding is completed to prevent the plastic from entering the exhaust hole 5 through the through hole 6 and causing the exhaust hole 5 to be blocked. The exhaust mechanism 8 is provided with a cleaning mechanism 9 for cleaning the through hole 6. By providing the cleaning mechanism 9, the plastic on the inner wall of the through hole 6 can be cleaned to prevent the plastic from affecting the ball plug 87 from sealing the through hole 6.

[0027] The exhaust mechanism 8 comprises a rotating drum 81, a T-shaped rod 82, a connecting rod 83, a spiral groove 84, a protrusion 85, a cylinder 86 and a ball plug 87; the rotating drum 81 is rotatably connected to the inner wall of the exhaust hole 5, the rotating drum 81 is provided with a spiral groove 84, the outer wall of the rotating drum 81 is fixedly installed with a protrusion 85, the protrusion 85 can be pushed and pulled by the connecting rod 83, and the rotating drum 81 can be driven by the protrusion 85 to rotate, the top of the upper mold 3 is fixedly installed with a cylinder 86, the T-shaped rod 82 is slidably connected to the inner wall of the slide groove 7, the outer wall of the T-shaped rod 82 is attached to the inner wall of the spiral groove 84, the rotating drum 81 rotates and cooperates with the spiral groove 84 to squeeze the T-shaped rod 82, so that the T-shaped rod 82 slides up and down on the inner wall of the slide groove 7, and the T A ball plug 87 is fixedly installed at the bottom of the T-bar 82, and the outer wall of the ball plug 87 is attached to the inner wall of the through hole 6. The ball plug 87 can be driven to detach from the through hole 6 by sliding the T-bar 82 upward. At this time, the air in the cavity between the upper mold 3 and the lower mold 1 can be discharged outward through the through hole 6 and the exhaust hole 5. The ball plug 87 can be driven to move downward and attach to the inside of the through hole 6 by sliding the T-bar 82 downward. At this time, the through hole 6 can be blocked by the ball plug 87 to prevent plastic from entering the exhaust hole 5 and causing the exhaust hole 5 to be blocked. One end of the connecting rod 83 is hinged at the bottom of the protrusion 85, and the other end of the connecting rod 83 is hinged at the piston end of the cylinder 86. The connecting rod 83 can be pushed and pulled by starting the cylinder 86.

[0028] The cleaning mechanism 9 comprises a cross bar 91, a longitudinal bar 92, a connecting rod 93 and a scraper 94; the cross bar 91 is fixedly mounted on the inner wall of the rotating drum 81, and the longitudinal bar 92 is fixedly mounted on the outer wall of the cross bar 91. When the rotating drum 81 rotates, the cross bar 91 will be driven to rotate synchronously. At this time, the cross bar 91 will drive the longitudinal bar 92 to rotate synchronously. The end of the longitudinal bar 92 away from the cross bar 91 passes through the T-bar 82 and the ball plug 87 and is fixedly mounted with a connecting rod 93, and the longitudinal bar 92 fits with the penetration of the T-bar 82 and the ball plug 87. The end of the connecting rod 93 away from the longitudinal bar 92 is fixedly mounted with a scraper 94. The rotation of the longitudinal bar 92 cooperates with the connecting rod 93 to drive the scraper 94 to move in contact with the inner wall of the through hole 6. The side wall of the scraper 94 fits the inner wall of the through hole 6. The scraper 94 can be used to scrape off the plastic attached to the inner wall of the through hole 6 to prevent the plastic from adhering to the inner wall of the through hole 6 and affecting the ball plug 87 to block the through hole 6.

[0029] Working principle: The upper mold 3 can be guided by the guide rod 2 so that the upper mold 3 can overlap with the lower mold 1. When the upper mold 3 and the lower mold 1 overlap, the plastic is injected into the injection tube 4 by the injection molding machine so that the plastic enters the cavity between the upper mold 3 and the lower mold 1. At the same time, the cylinder 86 is started to push the connecting rod 83, so that the connecting rod 83 pushes the protrusion 85, so that the protrusion 85 drives the rotating drum 81 to rotate. The rotation of the rotating drum 81 and the spiral groove 84 can squeeze the T-shaped rod 82, so that the T-shaped rod 82 slides upward on the inner wall of the slide groove 7. The upward sliding of the T-shaped rod 82 can drive the ball plug 87 to disengage from the through hole 6. At this time, the upper mold 3 and the lower mold 1 are The air in the cavity between the molds 1 can be discharged outward through the through hole 6 and the exhaust hole 5. When the plastic injection molding is completed, the cylinder 86 is started again to pull the connecting rod 83. At this time, the connecting rod 83 will pull the protrusion 85, so that the protrusion 85 will drive the rotating drum 81 to rotate in the opposite direction and reset again. At this time, the rotation of the rotating drum 81 and the spiral groove 84 can squeeze the T-bar 82 downward, so that the T-bar 82 slides downward on the inner wall of the slide groove 7. The downward sliding of the T-bar 82 can drive the ball plug 87 to move downward and fit into the inside of the through hole 6. At this time, the ball plug 87 can be used to block the through hole 6 to prevent the plastic from entering the inside of the exhaust hole 5 and causing the exhaust hole 5 to be blocked.

[0030] When the rotating drum 81 rotates, it will drive the cross bar 91 to rotate synchronously. At this time, the cross bar 91 will drive the longitudinal bar 92 to rotate synchronously. The rotation of the longitudinal bar 92 and the connecting rod 93 can drive the scraper 94 to move in contact with the inner wall of the through hole 6. At this time, the scraper 94 can be used to scrape off the plastic attached to the inner wall of the through hole 6 to prevent the plastic from adhering to the inner wall of the through hole 6 and affecting the ball plug 87 from blocking the through hole 6.

[0031] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A micro-foam injection mold exhaust structure, comprising a lower mold (1) and an upper mold (3), wherein a guide rod (2) is fixedly installed on the top of the lower mold (1), the upper mold (3) is slidably connected to the outer wall of the guide rod (2), and an injection tube (4) is fixedly installed on the inner wall of the upper mold (3), characterized in that: The upper mold (3) is provided with an exhaust hole (5), the bottom of the exhaust hole (5) is provided with a through hole (6), the side wall of the exhaust hole (5) is provided with a slide groove (7), the upper mold (3) is provided with an exhaust mechanism (8), the exhaust mechanism (8) is provided with a cleaning mechanism (9) for cleaning the through hole (6), and the exhaust mechanism (8) comprises: A rotating drum (81), the rotating drum (81) is rotatably connected to the inner wall of the exhaust hole (5), a spiral groove (84) is provided on the rotating drum (81), a convex block (85) is fixedly installed on the outer wall of the rotating drum (81), and a cylinder (86) is fixedly installed on the top of the upper mold (3); A T-shaped rod (82), wherein the T-shaped rod (82) is slidably connected to the inner wall of the slide groove (7), a ball plug (87) is fixedly mounted on the bottom of the T-shaped rod (82), and the outer wall of the ball plug (87) is in contact with the inner wall of the through hole (6); A connecting rod (83), one end of which is hinged to the bottom of the protrusion (85), and the other end of which is hinged to the piston end of the cylinder (86).

2. A micro-foam injection mold exhaust structure according to claim 1, characterized in that: The cleaning mechanism (9) comprises a cross bar (91), and the cross bar (91) is fixedly mounted on the inner wall of the rotating drum (81).

3. A micro-foam injection mold exhaust structure according to claim 2, characterized in that: A longitudinal rod (92) is fixedly mounted on the outer wall of the cross rod (91); one end of the longitudinal rod (92) away from the cross rod (91) penetrates the T-shaped rod (82) and the ball plug (87) and is fixedly mounted with a connecting rod (93); and the longitudinal rod (92) fits closely with the penetration points of the T-shaped rod (82) and the ball plug (87).

4. The micro-foam injection mold exhaust structure according to claim 3, characterized in that: A scraper (94) is fixedly mounted on one end of the connecting rod (93) away from the longitudinal rod (92).

5. The micro-foam injection mold exhaust structure according to claim 4, characterized in that: The side wall of the scraper (94) is attached to the inner wall of the through hole (6).

6. The micro-foam injection mold exhaust structure according to claim 1, characterized in that: The outer wall of the T-shaped rod (82) is fitted onto the inner wall of the spiral groove (84).

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